#include <stdio.h>
#include <ctype.h>
#include <string.h>
int main() {
    char s[101];
    fgets(s,sizeof(s), stdin);
    for(int i = 0; s[i] !='\0'; i++) {
        if (!(isalnum(s[i]) || s[i] == ' ')) {
            printf("Invalid input");
            return 0;
        }
    }
    int freq[256] = {0};
    for(int i = 0; s[i] ! = '\0'; i++) {
        char ch = tolower(s[i]);
        if (ch == 'a' || ch == 'e' ch == 'i' || ch == 'o' || ch == 'u')
        freq[(unsigned char)ch]++;
    }
    char result[150];
    int idx = 0;
    result[idx++] s[0];
    
    
    for(int i = 0; s[i] ! = '\0'; i++){
        char ch = s[i];
        char low = tolower(ch);
        if (low == 'a' || low == 'e' low == 'i' || low == 'o' || low == 'u') {
        if (freq[(unsigned char)low] == 1)
    result[idx++] = ch;
        }
    }
    int len = strlen(s);
    char last = s[len - 1];
    if (last == '\n')
    last = s[len - 2];
    result[idx++] = last;
    result[idx] = '\0';
    printf("%s", result);
    return 0;
}